Power interviewers do a lot of interviews. They can do them in their sleep and crank them out like an assembly line. But assembly lines aren't nuanced, I fear power interviewers lose the ability (or desire?) to assess candidates through their performance instead of strictly assess the performance.
Power interviewers concern me. I think they end up with too much influence over a company's hiring practices.
I've heard of people at big companies who conduct thousands of interviews a year. This gives them a lot of sway in company hiring practices and culture.
The problem, though, is these large companies are hiring at scale. Growth + attrition yields a lot of hires. Google itself just announced in their earnings call nearly 20k more employees in the past year. That means 100k+ interviews conducted. It's hard to have every interview stay personal an nuanced at that scale.